Gil and Kelly Bates, and their 19 kids, are buzzing about the latest addition to their family; the first Bates grandchild! As the girls prepare to throw a huge baby shower to celebrate, Alyssa gives the family some surprising news of her own and an accident leaves the family shaken.

Erin invites her siblings over for a sleepover to help ease the transition from a full house to living with only her new husband, Chad. Zach and Whitney get real about becoming parents. Michaella wants to surprise visit her beau, Brandon, in Texas, but will it go against the family's strict rules of courtship?

The whole Bates clan packs up and heads to the great outdoors! If you think packing for your family is hard...try packing for 21! Not everyone loves being in the wild and the entire family has different ideas about what "roughing it" really means.